/Engine/Source/Runtime/Engine/Public/StereoRenderTargetManager.h
Allocates a shading rate texture. The default implementation always returns false to indicate that the default texture allocation should be used instead.
true, if texture was allocated; false, if the default texture allocation should be used.
virtual bool AllocateShadingRateTexture ( uint32 Index, uint32 RenderSizeX, uint32 RenderSizeY, uint8 Format, uint32 NumMips, ETextureCreateFlags Flags, ETextureCreateFlags TargetableTextureFlags, FTexture2DRHIRef & OutTexture, FIntPoint & OutTextureSize )